Electron-discharge device



June 5, 1928.

s. w. CROWLEY ELECTRON DISdHARGE DEVICE Filed Feb. 2, 1924 2 Sheets$heet 1 INVENTOR SylvesTer W. Crowley BY l Y 5 l NE) June 5, 1928.

ShW. CROWLEY ELECTRON DISCHARGE DEVICE Filed Feb. 2, 1924 2 Sheets-Sheet 2 Fig.10.

1N VENTOR SylvesTer W. Crowley 45 parts of the electron discharge device, ex-

tending the same upwardly through the end of the stem wherein they are sealed as shown.

' Patented June 5,1928.

UNITED "STATES 1 AT T OF SYLVESTEB W. CROWLEY, OF WEEHAWKEN, I RADIO TELEPHONE TELEGBAYE'CQ, Ol'

TION OF DELAWARE.

J'E RSEY'CI'IY, NEW JERSEY, A CORPORA- ELECTRON-DISCHARGE nnvrcr.

Application filed Februar a, 1924." .Serial Ho. 090,191.

' This invention relates to electron dis charge devices and more particularly to the plate and its mounting used in connection 'with such devices.

The objects of the invention are to providea plate of improved structure; to enable the plate to be readily mounted in place; to obt in the proper formation of the plate prior inserting the same in the electron discharge device; to obtain. a plate which f-willbe rigid; to secure'a supporting means 'which will properly carry the plate; to secure simplicity of construction and operation, and to obtain other advantages and results asmay be brought out in, the following description.

Referrin to the accompanying drawing in which like numerals of reference indicate similar parts throughout the several views;

the parts within; 7

s Figure 2 is a plan of the invention mount ed upon the stem;

Figure 3 is a vertical sectional view as upon line 33 of Figure 2;

Figures 4, 5 and 6 are perspective views of the plate showing the same in successive stages of manufacture; F1gure7 1s a view similar to Figure showing a modified arrangement of parts; Figure 8 is a vertical sectional view of Figure7 corresponding to FigureB; 35' i and grid positioned. therein; and

Figure 9 is a perspective view of plate p Figure 10 is a side elevation of the grid. In the specific embodiment-of the lnvention illustrated in said drawing, reference numeral 1 indicates the usual baseand nu mral 2 indicates the, usual bulb-carried by.

the base within which is mounted a stem 3 carrying the operative parts of the electron discharge device. It is usual to provide several leads and supports for the operative in Figure 3. In carrying out my invention, I provide a lead 4 and another wire 5 both .of'which constitute supports projecting in parallel relation to each other from the top of the stem 3. In manufacture of devices ofthis sort,'I have found it practical to very their distance apart will e substantially the same in every case.

I The ..supports 4 and 5 are adapted for mounting a plate 6, the structure of which forms an essential part of the present invention. Said plate is preferably stamped out of a sheet of metal of proper thickness and material so as to provide extensions 7 and 8 at the central part of opposite longitudinal'edges. The plate is then bent into substantially cylindrical shape so that said longitudinal edges will be parallel and adjacent to each other and the said extensions will be flatwise of each other and project from the cylindrically shaped plate.

One of the extensions, as 7, has a tongue 9 at its end away from the body portion of the plate, and the other extension, as 8, is provided with laterally extending tabs 10 adjacent its outer end but extending from the side edges of said extension. After the extensions arebrought flatwise together, the longitudinally extending tongue 9 on an extension 7 is bent over the upper edge of the other extension 8 so as to hold the two together as clearly illustrated in Figure 5.

Tabs 10 are bent into a perpendicular position with respect to the said extension both in the same general and parallel direction. After this operation upon the various parts, the outwardly extending tabs 10, 10 are curled inwardly so as to form substantially parallel sockets extending in a direction transverse to the axis of the cylindrical portion of theplate and in the same-general direction as the said extensions. These parallel sockets formedb the curling in, of the said tabs are spaced t e same distance apart as the spacing of supports 4 and 5 on the stem. Accordingly, in assembling the plate upon the stem, the curled tabs or sockets nnw JEnsEx, ASSIGNOR ro nn ronnsr manner of mounting has the effect of an plate is mounted it will be substantially above the stem. By way of" illustration, I have shown this structure in Figures 7 to 10 wherein the base 1, bulb 2 and stem 3 remain the same, as well as the supports 4 and 5 for the plate. The plate itself, except for the bending of the extensions, also remains substantially before. However, for purposes of definiteness I have indicated the plate with reference numeral llflprovided with extensions 12 and 13, one of which, as 12 is provided with a tongue 14 at its end which is bent over the other extension 13 for securing the two together. Extension 13 is provided with curled tabs 15 similar to tabs 10 already described. As will be noted from the several figures now being described.

the extensions project outwardly from the plate in a diametric direction and the plate is mount-ed above the stem, the said curled tabs or sockets 15 sliding downwardly on the supports 4 and 5.

Within the plate is provided a grid 16 preferably in the shape of a coil and carried by a U-shaped bracket 17 which preferably extends through the said coil and is welded to each convolution of the grid. Said bracket 17 provides downwardly extending ends 18. 18 which are subsequently welded to supports 19, 19 projecting upwardly from the stem. It is to be noted that the diame ter of the grid and the distance which the ends 18 of the bracket 17 extend is so proportioned that the grid with its attached bracket may be inserted into the plate after the plate has been assembled. The fact that the extensions on the plate are held together at the outer ends enables the plate to be spread so as to provide a gap between the inner ends of the said extensions through which the projecting end 18 of the bracket may pass when the grid is slid into place. After the parts are assembled and the plate slid onto its supports, the bracket ends 18 ma be welded to their supports and the soc ets 15 welded to their supports. By use of suitable a paratus these welding operations may all lie done at once by. a spot welding machine thus enabling the device to be made with considerable rapidity.

There are a number of details in the showing herein, such'as the exact size and shape of the plate, the length of the extensioris, thedirection ofbending of the tabs, which may be modified as found desirable and still obtain, the benefits of my invention. Furthermore, there may be other modifications and changes which may be incorporated in the manufacture and use of my invention, and I do not wish to-be understood as limiting myself to the exact structure shown except as set forth in the following claim when construed in the light of the prior art.

Having thus described my invention, I

claim v Inan electron discharge device construction including an evacuated vessel having a stem, a cylindrical plate-having two juxtapositioned tabs secured together, a plurality of sockets formed on one of said tabs lying centrally with respect to the height of the plate and transversely of the plate and supports projecting from said stem a distance substantially equal to the diameter of the plate, said supports receiving said sockets to support the plate transversely with.

respect to the stem and in close proximity thereto.

SYLVESTER W. CROWLEY. 

